一阶段ok

internal/imap_server/server.go

@@ -0,0 +1,66 @@
+package imap_server
+
+import (
+	"crypto/tls"
+	"fmt"
+	"log"
+
+	"mail_go/config"
+	"mail_go/internal/store"
+
+	"github.com/emersion/go-imap/backend"
+	imapserver "github.com/emersion/go-imap/server"
+)
+
+// IMAPServer wraps a go-imap Server and provides mailbox access capability.
+type IMAPServer struct {
+	stores *store.Stores
+	cfg    config.IMAPConfig
+}
+
+// NewIMAPServer creates a new IMAP server instance.
+func NewIMAPServer(cfg config.IMAPConfig, stores *store.Stores) *IMAPServer {
+	return &IMAPServer{
+		stores: stores,
+		cfg:    cfg,
+	}
+}
+
+// newServer creates a configured imapserver.Server with the given address.
+func (s *IMAPServer) newServer(addr string) *imapserver.Server {
+	be := &imapBackend{stores: s.stores}
+	srv := imapserver.New(be)
+	srv.Addr = addr
+	srv.AllowInsecureAuth = true
+	return srv
+}
+
+// Start starts the IMAP server on the plain-text port.
+func (s *IMAPServer) Start() error {
+	srv := s.newServer(s.cfg.Addr)
+	log.Printf("IMAP server listening on %s", s.cfg.Addr)
+	return srv.ListenAndServe()
+}
+
+// StartTLS starts the IMAP server on the TLS port.
+func (s *IMAPServer) StartTLS() error {
+	if s.cfg.TLSCert == "" || s.cfg.TLSKey == "" {
+		return fmt.Errorf("IMAP TLS certificate or key not configured")
+	}
+
+	cert, err := tls.LoadX509KeyPair(s.cfg.TLSCert, s.cfg.TLSKey)
+	if err != nil {
+		return fmt.Errorf("failed to load IMAP TLS certificate: %w", err)
+	}
+
+	srv := s.newServer(s.cfg.TLSAddr)
+	srv.TLSConfig = &tls.Config{
+		Certificates: []tls.Certificate{cert},
+	}
+
+	log.Printf("IMAPS server listening on %s", s.cfg.TLSAddr)
+	return srv.ListenAndServeTLS()
+}
+
+// ensure imapBackend satisfies backend.Backend at compile time
+var _ backend.Backend = (*imapBackend)(nil)